Maybe I miss stated. This is not a NOS GM part, but it does line up perfectly for proper geometry. I am attaching 2 pics., the new part is a little heavier casting. The casting # on the new replacement is; 14 256 04. My original part # is; 3908385 8 GMT. I had a MOOG K6099 which was listed as correct for my 67, it wasn't even close to matching up to the original.

Sorry that I haven't thought to do this earlier. I now have pics. of this Idler Arm installed, and the geometry looks perfect. I am posting pics.. I am very happy with this Idler Arm, the little hump on top even matches the Pitman Arm.